Pneumatic tire spreader



Ma '4, 1948. R A mo 2,440,740

PNEUMATIC TIRE SPREADER Filed March a, 1944" IN V T 0 PASGU/ME I0.

ATTOENE x Patented May 4, 1948 OFFICE PNEUMATIC TIRE SPREADER PasqualeDaddio, New York, N. Y. Asstss March 6, 1944, Serial No. 525,158

' 4 Claims. (01. 152-400) This invention relates to pneumatic It isparticularly directed to self-sealing tires. for automobiles and thelikevehicles.

An object of this invention is to provide in a tire of the characterdescribed, highly improved means forassembling the tire carcass and thetire rim.

Another object of this invention is to provide" in a tire of thecharacter described highly improved means to apply an inner selfesealinglining to the tire carcass. w

Still another object of this invention is to provide a tire of thecharacter described having means to prevent loosening of the tire on therim While in use. p

Yeta further object of this invention is to provide a strong and durabletire construction of the character described which shall be relativelyinexpensive to manufacture, easy to assemble and disassemble and whichshall yet be practical and eflicient to a high degree in use. 7

Other objects of this invention will in partbe obvious and in parthereinafter pointed out.

The invention accordingly consists in the features of construction,combinations of elements, and arrangements of parts which will beexemplifled in the construction hereinafter described, and

of which the scope of application will be indicated in the followingclaims.

In the accompanying drawing, in which is of this invention: 7

Fig. 1 is a side elevational view of an assembled clamp for assembling atire withja tire rimand embodying the invention, and showing the] strapopened up. m

Fig. 2 is a view similar to Fig. 1 but showingthe clamp'tightened up andin the position it assumes when the tire is assembled.

Fig. 3 is an enlarged outer view of a portion of the tire clamp.

Fig. 4 is a cross-sectional view taken on. line 4-4 of Fig. 3.

Fig. 5 is a transverse cross-sectional view through a tire and rimembodying the invention and illustrating one step in the assembly of thetire.

Fig. 6 is a view similar to Fig. 5. but showing the tire assembled withthe rim.

Fig. 7 is an enlarged cross-sectional view of a portion of the rim andassembled clamp and illustrating the air valve provided with means fortightening up the clamp.

Referring now in detail to the drawing, in designates an assembled tireand rim for the wheel of an automobile or shown various possibleillustrative embodiments.

the like vehicle, in assembled condition. The same comprises an annularmetal tire rim II on which is mounted a tire carcass l2 provided with aninner lining l3 and assembled with said rim by means of a clamp l4.

'The metal rim H comprises an inner annular wall l5 from the sides ofwhich extend outwardly inclined walls l6. Extending outwardly from walls16, are annular cylindrical walls or shoulders l1. Extending outwardlyfrom walls I] are flanges l8.

The carcass or shoe l2 suitable construction may be made of any and isformed with inner beads 20. The lining I3 is made of the same rubber asis used for an inner tube. The lining I3 is made by building a tire orcarcass right onto the lining while both are still uncured and thencuring the lining and the carcass at the same time so as to vulcanizethe lining directly onto the inside of the carcass. Thus should a holeor puncture be formed in the tire extending through. the lining, saidlining being of soft rubber will seal itself. i

Highly improved means i4 is provided for clamping the carcass l2 to therim l5. Said clamping device I4 comprises three substantially similarhinged-together sections 30 in tandem made of sheet metal and ofsubstantial U-shaped transverse cross-section. Thus each section 30 hasan inner wall 3| and outwardly divergent side walls 32. Each sectionishinged to an adjacent. section by a hinge 33. Although the drawingillustrates member M as composedof three sections it will be understoodthat the same may consist of any suitable number of sections 30. Theadjacent ends of the bottom walls 3| of the end sections 39 are formedwith struck-up rearwardly extending hooks 34 for the purpose hereinafterappearing- Interconnecting said adjacent ends is a band 40. The band 40may be made of flexible steel or any other suitable flexible materialand is connected to loops 4| at the ends thereof engaging the hooks 34.Band or strip 40 is thus removably or detachably connected to member M.

It will now be understood that when the clamping member I4 is opened upit can easily flt over the tire rim I5 to be inserted over the tire.Sections 30 only surround a major portion of rim ll.

Means is provided to wind up the band 40 so as to close the clamp I4about the rim of the tire for clamping the beads 20 of the carcass l2against the flanges l8 of the rim II. It will be understood that thesections 30 fit in between the beads 20 of the carcass, and when thestrap 40 is tightened, are adapted to press said beads tightly againstthe flanges l8 of the tire rim H. To this end one of the walls l6 of rimII is formed with a through opening and extending therethrough is an airvalve 50. The head of the air valve is located within the rim.Interposed between the head 5| and Wall I5 is a rubber washer 53. Theair valve 50 is provided with a pair of parallelispacedirodextensionsjfififormed: with a spaceor-slot 51'therebetween;

It will be noted that the rods 56 project between the pair of endsections 3!] and receive the band? 40 within the slot 57.

On the screw threaded portion or key 58 of the air valve is a lock nut60. Interposedbetweem ,surfacerof wall.

the lock nut 56 and the exterior I5 is a lock washer 5| and a plainWasher 62';

When the lock nut 60 is loosened, the airxvalve 50 may be rotated in aclockwise direction as show-ntin Fig; 1 of the drawing; to tighten-and.shorten .the-bandAEl as illustratedzin-Fig, lot-the, draw-ing, Asband atis shortened the sections Sill-will closein about therim-lland willcompress the beads of ;-the carcass against-said rim.l When the airvalve is sufliciently tightened ,up the. locl nut 66 is tightened to.keep thetire tightly clamped on, the rim.

It will now, be understood that thekey onv air valveisturnedsclockwise-to tighten the bandfor, bringing, thesectionsintightengagement against; the bead or tire so as to press the sameintointimate engagement with. the rim of thewheel. The nutuis thenlooked up tightly, against the loci; washer and: the plain, washer; soLthat any strain: onthe band tending: to. unwindit would also tenito.rotate theuvalve stemcounterclockwise andthus tend to tighten the nut aIf it is desired to.disassemble the tirefrom, the,

rim, the, lock, nutfil] is loosened, then .the valve moan be unwound. V

It will. thus, be seen that vvthere is provided a device inwhiohutheseveral, objects ofv thisinven:

tion are achieved, and which is well adaptedto,

meet the conditions of practicaluser Asivariouspossible embodimentsmight bemade of theabove invention, and ,as-various chan es. might, bemade in the embodiments aboveset forth, it is, to be understoodthatallmatter herein, set forth or shown inthe aCCOmDaIIYi g r wing, is tobe interpreted as illustrative and not inv a, limiting sense.

' Having. thus describedmy invention, what I. claim as new and desireto. secure by Letters. Patent is:

1. In combination, a drop center tire rim, a

tire. carcass thereon, meansgwithin said carcass,v

clamping said carcass to said rim, saidmeans comprising a member partlysurrounding said rim engaging said carcass and composed of a,

plurality of sections pivoted end to end, flexible means detachably.interconnecting the ends of, the end sections, means ,on'therim operablefrom 4 without the tire carcass to wind up said flexible means withinthe said carcass for drawing the ends of said member together to tightensaid member onto said rim, and means to prevent unwinding of saidflexible means. 7

2. In combination, a, drop center tire rim, a tire carcass thereon,means within said carcass clamping said carcass to said rim, said meanscomprising a member partly surrounding said imengasin z iil cas sfl x limeans i terconnecting the ends of said member, means 01' ing the endsof said member together to tighte the rim to wind up said flexible meansfor drawA said lmember onto said rim, and means to prevent unwinding ofsaid flexible means, said windingrmeans comprising an air valve providedwith a pairlof spaced parallel rod extensions receiving said'flexibtlemeans therebetween.

3,,slnscombination, a drop center tire rim, a tire carcass thereon and adevice within said carcasaclamping saidcarcasato said rimiqprovice ,altht airrseal,therewithm a ck s com s g a u d-. iointedmcmb r ndg eflesibla band i terconnectin hce 'n af'sa d he i c andmeans,onth rimhandzwit inthe.tirefcarcassrfor-z r w heensi of said member together toclamp the carcassi tightly, against .,the,.rim to vpioduceran a sealtherebetween. V 4-...Ini ombination a r p cnter. tiregrimi, a, tirecarcass thereon and a devicewithin,said v arcass cIampingsa d arcasstosaid rimtofprovide aitigiht air sealltherewith, saids'device com-.missing a. curvedjointedgmember Z anda flexiblei, band interconnectingthe ends of saiiimembcr, and means. on the,,rim i to wind-,up, said,flexible bandior, drawingthewendsi f; sai emberto; a r, to, l p,ctcarcassst ghtly ainstithe rim, tQaPt-Od-UQQ an, air, sealtherebctweeni. d. means. to. prev nt unwinding-; f. aid; fiexr l, means,said winding means comprising anair al e pr videdwitn,anairotispacdparahelrod extensions. receiving, cidlfi xible and therebetween,

, rAsauar-lnnannidj CITED- The following;-reierencestare of rec9rd flleof this patent: I

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